Apparatus for cooking and for carrying out like operations by means of electricity.



G. G. BELL.

APPARATUS FOR COOKING AND FOR CARRYING OUT LIKE OPERATIONS BY MEANS OF ELECTRICITY.

APPLICATION FILED NOV. 7, 1911 1,069,377, Patented Aug. 5, 1913. A

6 SHEETSSHEET 1.

WITNESSES: IINVENTOR M X KW ATTORNEYS G. G. BELL.

APPARATUS FOR GOOKINGAND FOR CARRYING OUT LIKE OPERATIONS BY MEANS OF ELECTRICITY.

APPLICATION FILED NOV. 7,1911.

1,069,877. "Patented Aug. 5, 1913.

6 SHEETS-SHEET 8.

V Z 1 av n &

WITNESSESi v 'INVENTOR KMQYMWW ATTORNEYS G. G. BELL. I APPARATUS FOR COOKING AND FOR CARRYING OUT LIKE OPERATIONS BY MEANS OF ELECTRICITY.

APPLICATION FILED NOV. 7, 1911.

Patented Aug. 5, I913.

6 SHEETSSHE ET 3.

INVENTOR ATTORNEYS WITNESSESz" G. e. BELL.

APPARATUS FOR GOOKING AND FOR GAHRYIN G OUT LIKE OPERATION S BY MEANS OF ELECTRICITY.

APPLICATION- FILED NOV. 7, 1911.

1,069,377, Patented Aug. 5, 1913.

e SHEEN-SHEET 4.

, WITNESSES: I I 'N'V ATTORNEYS I I G. e. BELL. APPARATUS FOE COOKING AND FOR GARRYIN G OUT LIKE OPERATIONSBY MEANS OF ELECTRICITY.

APPLICATION FILED NOV. 7, 1911.

Patented Aug. 5, 1913.

'6 SHEETS-SHEET 5.

INVENTOR WITNESSES m m ATTORNIQJM 0. a. BELL. APPARATUS FOR COOKING AND FOR GARBYING OUT LIKE OPERATIONS BY MEANS OF ELECTRICITY; APPLIOA'I'IQNTILED NOV. 7, 1911.

1,069,377. Patented Aug. 5, 15,713.

6 SHEETS-SHEET 0.

UNITED sra'rns PATENT orr'ron.

GEORGE GILBERT BELL, OF KENSINGTON', LONDON, ENGLAND, ASSIGNOR T0 ELECTRIC HEAT STORAGE COMPANY, A CORPORATION 01 NEW YORK.

APPARATUS FOR COOKING AND FOR CARRYIN'G GUT LIKE OPERATIONS BY MEANS OF ELECTRICITY.

I Specification of Letters Patent.

Application filed November 7, 1911.

To all whom it may concern Be it known that I, Gnonon GILBERT BELL, a subject of the King of Great Britain, and a'resident of Kensington, London, England, have invented certain new andusetul Improvements in Apparatus for Cooking and for Carrying Out Like Operations by Means of Electricity, of which the tollowingis a specification.

, This invention relates to improvements in apparatus for cooking and for carrying out like operations by means of electricity.

It has already been proposed to employ a thermal. mass or heat accumulator of a material preferably having a high specific heatvalue and a high thermal conductivity, such as iron, which has been heated electrically, for the purpose of heating water, the mass being suitably protected o-r lagged by acovering ofv a material which is a poor con ductor of heat so that it is capable of storing a considerable amount of heat. Now according to the present invention a steam space or chamber is formed in such a heat accumulator and is connected at or near its lower end say, by a pipe, to a feed water tank while at or near its upper end a steam supply pipe or pipes is or are taken out so that the steam may be used in cooking apparatus at any point as required and a pipe for the return of the condensed steam to the steam space in the heat accumulator may be employed if desired. The feed water tank is suitably arranged below the level of the place where the steam is applied to the cooking apparatus in order to prevent any sudden rush of water from the steam. outlets in the event of a large amount of steam being suddenly used, and the return pipe aforesaid pret'erably returns to the steam space by way of the feed water pipe which is in connection with the steam space. Also according to this invention a steam producing,

apparatus of this type may bearranged in combination with an apparatus for heating a cooking oven by passing electrically heated air into it "and in such an arrangementthe heat accumulator containing the steam space may be heated by conduction from the heat accumulator for heating the air.

Referring to the accompanying drawings :-F1gure 1 1S a diagrammatic sectional Patented Aug. 5, 1913.

Serial in). 659,040.

front elevation of one arrangement of an improved electrical steam producing apparatus according to this invention. Fig. 2 is a sectional elevation of a modified form of apparatus, and Fig. 3 is a plan of Fig. 2 with the hot plate or cooking table removed to show the arrangement of the steam pipes and valves. Fig. l is a sectional front ele vation of another modified form of cooking apparatus comprising an electrical steam producing apparatus combined with a cooking ov'en heated electrically by hotair, and Fig. 5 is,a sectional side elevation of Fig. 4. Fig. 6 is a sectional elevation of a further modified form of apparatus, and Fig. 7 is a sectional plan on the line VIIVII of Fig. 6. Figs. 8 to 13 are elevations of arrangements for supplying steam to cooking pots.

Fig. 14 is a side elevation and Fig. 15 is a sectional front elevation of an arrangement I for supplying steam to a cooking pot in which a return pine is provided for the condensed steam.. 1

According to one arrangement and as.

illustrated in Fig. 1, the feed water tank a communicates with the box-shaped steam space Z) in the heat accumulator c which is of rectangular section by means of a pipe or conduit (Z and the heat accumulator c is heated by a suitable electrical heating unit a. Steam is thus produced in the steam space I) under the pressure due to the head of water in the feed tank a and this steam passes from the steam space Z) by a pipe f to steam supply pipes g,h, provided with valves 2', 7a, or like means of control so that steam may be distributed as required to cooking-vessels or pots which may be arranged at the steam outlets Z and m. Itwill be noticed that the feed tank a is arranged so as to be below the level of the steam outlets 'Z and m whereby any sudden rush of water from-such outlets is prevented in the event of there suddenly being a large amount of steam used. A return pipe 91. may beprovided for the return of condensed steam from the cooking vessel at Z to the steam space 75, byconnecting the pipe 12. to the feed water pipe (Z as shown and this pipe n may be fitted with a valve or like device 0.

According to the modified arrangement shown in. Figs. 2 and 8 the feed water tank purposes, water is admitted, as it becomes andslightly inclined to the horizontal, while the heat accumulator 0 1s of rectangular sec-' .tion. being pressure then existing therein being that pipes g, It,

be provided with a pipe n for the return oil:

"a may be geared together by "z from which the heated air passed into from the oven to is by we.

a also arranged so that the level of the l iced wat-f tank 1s below the level ot tl outlet or outlets at which. the steam. is to be drawn oil. The steam space Y) is suitably shallow, more or less rectangular in section, 1

heated by a heating unit 3. Steam is produced in the steam space Z), the

due to the head of water owing to the position of the feed water tank a, and the steam passes by way of the pipe f to steam supply 29. lhese steam supply pipes may be provided with valves 2', 70, g, or like means of control and they are also provided with respective steam outlets Z, in, r. in op eration, when steam is required for cooking necessary from the feed tank a to the heated steam space 5 and-:the steam produced is, under control of he valves a /a, Q, distributed as requiredv to cooking utensils .9, arranged at the "steam outlets Z, m, a. The cooking vessel at the steam outlet Z may, in addition to the steam supply pipe 5/,

for su 'iplying to an oven or the like. The

air heating apparatus preferab and as shown in this inodilio of de scribed in my co-penr for Letters Patent Serial No. Gu t the air 1. cing heated in a duct u in. a heat acciunulator an oven. to heat, the latter being then returned heat accumulator o to be reheatedj, he I heat accumulator o tor the the heat nohot air-fist superimposed upon .lCl a suitable cumulator 0 for the steam number of heating elcmen' are arranged between the two. heat accumulators c and v are as far possible surrounded by heat insulating maerial or lag;-

ging l and the narrow space bctv; een the two heat accumulators, not occupied by th e heating elements (12, y, .2, is also naked wi h. 2 ging 2. A or jacket ..ded

around the insulating 'ldec', air flow pipe or duct 3 provided with an extra heater 4 to increase the circulation of the air in the manner set pending ap iication for aforesaid. The re" in the cooled air holes in the top and if desired, and as shown, in the bottom of an inner door 6 of the oven and through the duct 7 between the inner oren. door 6 and an outer oven door 8. T he holes may be controlled by dam; pcrs or hit and miss valves 5 as shown, in on er to regulate the now of air'through said holes. The oven to is fitted with an additional heater u at the top to provide top heat during the preliminary portion. of any coo ting opei tion or as an auxiliary heater and suitable dampers 10, 11, and 12 are arranged in the air passages for regulating the circulation or" air. Moreover, and in the same manner as described in my copending application for Letters Patent aforesaid, a due or uptake is may be provided leading from or forming a continuation of the duct 3, the uptake being provided with hit and miss valves or dampers 1r for controlling the admittance of air into the oven as desired. Such an uptake of course may be employed in connection with any of the constructions of heating apparatus herein described which are provided with an oven. The space 15 on top of the oven to packed with loose heat insulating material and is covered over by the hot plate or cooking table 16 for carrying the cooking utensils. As in the previous constructions a feed water tank a is provided for supplyaccunnilator 0 and steam from the space 7) nuinner of a saddle boiler around the heat accumulator o for heating the air, ,the heataceumulator a; being heated by a heating unit (1. The heat accumulators c, o, are sura thin layer of heat insulating material 2 is placed between the two heat accumulators being of such thickness that the heat accumulator 0 may receive a certain amount of heat by conduction from the heat accumulater 4; and keep at a temperature above the boiling point of water. T he feed water tank a in this arrangement feeds into a second 'lecd wate. tank 0} arranged in the insulat in; material 1 by a pipe al and the water in the tank 0. which becomes slightly heated or warmed owing to the insulating material 1 becoming heated passes to'the steam space 31 of number of h by the pipe and coil. 2 which latter ing water to the steam space 7) in the heat.

may pass by way oi the pipes f, g, 71, p, to

1 are 7,- lhereia is arranged somewnat in the.

The feed water tank as rounded by heat insulating material 1 and i Lin prevents any rush of water from the tank a to the steam space Z). A coil such as (Z may of course be provided in connection with any of the previous constructions. Above the heat accumulators is arranged an oven to supplied with heated air from the duct a in the heat accumulator r, by the pipe or duct 3, the air returning by the pipe or duct- 7. A heating unit 4 may be arranged in the duct 3 for keeping up the circulation of the air and a preliminary heater 9 may also be arranged in the top of the oven to. The steam from the steam space Z) may pass by way of the steam supply pipe f, to cooking utensils placed at the steam outlets Z, m, T, which as before are above the level of the feed water tank a, and return pipe a may be provided from the steam outlet Z back to the steam space 6 by way of the pipe (Z the arrangement being the same as in Figs. 2

The construction and arrangement of the steam outlet Z in connection with cooking utensils and the adaptation of the steam nozzles m and a" to cooking utensils will now be more particularly describedwith reference to Figs. 8 to 15. According to the arrangement as shown in Fig. 8 the steam supply pipe such as h or p in Figs. 2 to 7 is fitted with a nozzle 17 adapted to be connected by a tubular sleeve 18 to a nozzle 19 fitted to the cooking pot 20 in its upper por tion. The sleeve or connector 18 may be made of metal or a short length of india rubber pipe may be employed. In another modification shown in Fig. 9 the steam pipe is provided with several lateral nozzles 21, 22, 23, at various heights, each being adapted to be connected to a. corresponding nozzle on a cooking vessel. The cooking vessels 2%, 25, 26, are arranged in a vertical column, the uppermost one being provided with a lid or cover 27. According to a further modification illustrated in Fig. 10 and in which the cooking pot 28 may be very easily placed in connection with the steam pipe, the latter, as shown, is allowed to project into a large tube 29 fitted to the bottom of the cooking pot 2S and projecting internally into the latter. The joint between the steam pipe and tube 29 made by a large india rubber washer 30 through which the steam pipe is passed as shown. In using this type of joint for the steam pipe, also, a number of cooking vessels may be arranged in a vertical column as shown in Fig. 11 the top vessel, only, requiring an ordinary lid. In Fig. 11, in which similar parts to those shown in Fig. 10 are similarly lettered the steam pipe is providdjwith lateral nozzles 31 one for each cooking pot. The modificationsshown in Figs. 12 and 13 provide means for cooking with steam in such cases in which it is necessary to prevent contact of the moisture with the food being cooked.

In Fig. 12 a steam nozzle 14' in a similar manner to that shown in Fig. 8 delivers into a steam jacket 32 inclosing the cooking pot, and in Fig. 13, the steam nozzle 17, delivers steam into a steam coil 33 at the bottom of the cooking pot, a return pipe 3% being suit ably provided for return of the steam. In another modification shown inFigs. 1a and 15 a system pro iding a steam outletZ a supply pipe 9 and a return pipe n for the condensed steam such as in F 1 to T is used. The cooking pot 35 is suitably provided with a steam space such as a hollow bottom 36 or jacket which is supplied with steam by the pipe 9. A neck 37 on the bottom surface or" the steam space 36 is connected by means of a suitable quick-make joint 38 preferably of the bayonet type as shown to a cup-shaped or cylindrical enlargement 39 of the condensed steam pipe 21. which projects through the cooking table 16. The steam supply pipe 9 as shown projects upward through this cup-shaped enlargement 39 into the steam space 36 of the cooking pot. By this arrangement the condensed steam falls into the cup-shaped enlargement 39 and readily returnsto the steam space in the heat accumulator in the manner aforesaid. The cup-shaped enlargement 39 is provided with an air-pipe 40 with a valve 41 which when opened allows any imprisoned air to escape when the steam is first turned on. To provide a tight joint, the edge of the neck 37 on the bottom of the cooking pot when in position is pressed on to an india rubber or like washer or pad 42 and there may be a packing or washer of wood 43 or the like between the idia rubber pad 42 and the cooking table 16.

It is of course evident that a heating unit such as is marked 44 in Fig. 11 may be provided in the lid of any of the cooking vessels, in order to provide top heat.

The various heaters are of course controlled by suitable switches, the main heaters 0, m y, 2, being, for instance, adapted to be switched on and oft by switches 45, and the auxiliary heaters aand 9, and heater it by means of switches 4-, {l7 and 43 respectively. v

V-Fhat I claim as new and desire to secure by Letters Patent, is:

l. The combination of an electrical air heating device provided with a heat storage mass and an air heating passageway adapted to be heated by said mass, an electrical water heating and steam generating device provided with a heat storage mass and a water heating chamber or passage adapted to be heated by said mass, and a common electrical heating element for heating both heat storage masses.

2. The combination of an electrical air heating device provided with a heat storage mass and an air heating passageway adapted to be heated by said mass, an'electrical water'heating'and steam generating device provided with a. heat storage'mass and a water heating chamber or passage adapted to be heated by said mass,'the heat storage mass of the airheating device being ar ranged above but in proximity to the heat storage mass of the steam generating device, and a common electrical heating element arranged between the said heat storage masses.

3. In a cooking device, the combination of an oven, means for utilizing steam for cooking purposes, an air heater for heating air for the oven and suitably connected therewith, a water heating and steam generating device suitably connected with the means for utilizing the steam, and a common electrical heating element for heating 0th the air heater and the water heater and steam generator.

4. The combination of an electrical air heating device, an electrical water heating and steam generating device, and a common electrical heating element for heating both heating device provided with a heat storage mass and an air heating passageway adapted to be heated by said mass, an electrical water heating and steam generating device provided with a heat storage mass and a water heating chamber or passage adapted to be heated bysaid mass, and a common electrical heating element for heating both heat storage masses, adapted normally to heat the heat storage mass of the air heating device to a higher degree than it does the heat storage mass of the steam generating device.

'7. The combination of an electrical air heating device provided with a heat storage mass and an air heating passageway adapted to be heated by said mass, an electrical water heating and steam generating deviceprovided with a heat storage mass and a water heating chamber or passage adapted to be heated bysaid mass, the heat storage mass of the air heating device being arranged above .but in proximity to the heat storage mass of the steam generating device, and a common electrical heating element arranged between the'said heat storage masses as in such a way as to heat the heat storage different degrees of oa er-7 mass of the air heating device to" a higher degree than it does the heat storage mass of the steam generating device. I

8. In a cooking device,the combination of an oven, means for utilizing steam for cooking purposes, an air heater for heating air for the oven and suitably connected therewith, a Water heating and steam gen-- erating device suitably connected with'the means for utilizing the steam, and a common electrical heating element for heating both the air heater and the water heater and steam generator, so constructed and arranged. as to heat the air heater to a higher degree of temperature than the Water heater and steam generator;

9. The combination-rot an oven, an air heater provided with a heat storage mass arranged below the oven and provided with an air heating passageway adapted to be heated by said mass, an electrical water heating and steam generating device provided with a heat storage mass and a water heating chamber or passage adapted to be heated by said mass, the heat storage mass of the air heater being. arranged above but in proximity to theheat storage mass of the steam generating device, a common electrical heating element, arranged between the said heat storage masses in such a way as to heat the heat storage mass of the air heater to a higher degree than the heat storage mass of the steam generating device, means for supplying water 'to the steam generating device and for conveying steam to any desired point for cooking purposes, a vertical air fine leading from the passageway in the air heater to'the oven, an electrical heating element arranged in said flue for heating the air therein and for starting and maintaining anupward flow of heated air to the oven, means for cutting one of the heating ele ments into operation and the other out of operation, and a return passage from the oven to the air heater for'the return to it of the spent heated air.

10. Apparatus for cooking and for carry ing out like operations by steam produced electrically, comprising in combination, a heat accumulator consisting of a mass of a material capable of storing heat and being a good conductor of heat, electrical means for heating said mass, a steam space in said mass, a feed water tank, means for supplying water as required from said feed water tank to said steam space, and steam outlets connected with said steam space, for supplying'steam to cooking apparatus, said feed water tank being arranged below the level of said steam outlets, substantially as set forth.

'11. Apparatus for cooking and for carrying out like operations by steam produced electrically, comprising in combination, a

heat accumulator consistingot' a mass of a apparatus, means for regulating said supply of steam, means for returning "condensed steam from said cooking apparatus to said steam space and means for regulating said return of condensed steam, substantially'as set forth.

12. A water heater and steam, generator containing a heat, storage mass, having an inclined passage therein'for receiving and heating the water, the passage provided with awater' inlet connecting with the lower 'end of the passage and a steam discharge outlet from the upper end of the passage.

13. A water heater andsteam generator having an inclined passage therein for re-v ceivi-ng and heating the Water andchanging it into steam, the passage provided with a.

water inlet connecting with the lower end of the passage and a steam discharge outlet from the upperend 'of the passage, and a -water supply tank higher'than the water inlet and connected with'itand provided with a dip. or.trap below the inlet point.

In'testimony whereof, I-have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE GILBERT BELL.

Witnesses:

O. J. WORTH, H. D. JAtmsoN'. 

